CN217063749U - Voice encryption system of simplified Lorenz-like circuit - Google Patents
Voice encryption system of simplified Lorenz-like circuit Download PDFInfo
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- CN217063749U CN217063749U CN202220080205.5U CN202220080205U CN217063749U CN 217063749 U CN217063749 U CN 217063749U CN 202220080205 U CN202220080205 U CN 202220080205U CN 217063749 U CN217063749 U CN 217063749U
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Abstract
The utility model discloses a voice encryption system of a simplified Lorenz-like circuit, which comprises a voice signal input end, a voice signal output end, an encryption module, a decryption module and a chaotic signal input module; the chaotic signal input module comprises a chaotic signal generator and a first operational amplifier, wherein the in-phase end of the first operational amplifier is connected with the chaotic signal generator, and the output end and the inverting end of the first operational amplifier are connected and used as the chaotic signal output end; the output signal of the chaotic signal output end encrypts the output signal of the voice signal output end, and then the encrypted signal is decrypted by the output signal of the chaotic signal output end; the utility model discloses can promote voice communication's security.
Description
Technical Field
The utility model relates to a simplify pronunciation encryption system of class Lorenz circuit belongs to signal encryption technical field.
Background
Often encrypt voice based on secret key among the prior art, this kind of encryption mode has certain regularity usually, is easily cracked, and in addition, this kind of encryption mode often relates to secret key transmission, causes the secret key to be stolen easily, and then leads to revealing of encrypted voice. Therefore, the existing voice encryption method based on the secret key has the problem of low safety.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the prior art, provide a simplify the pronunciation encryption system of type Lorenz circuit, solve prior art and encrypt the lower technical problem of security to pronunciation.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
a voice encryption system of a simplified Lorenz-like circuit comprises a voice signal input end, a voice signal output end, an encryption module, a decryption module and a chaotic signal input module; a first resistor, a second resistor, a third resistor and a fourth resistor are sequentially connected in series between the voice signal input end and the voice signal output end; the chaotic signal input module comprises a chaotic signal generator and a first operational amplifier, wherein the in-phase end of the first operational amplifier is connected with the chaotic signal generator, and the output end and the anti-phase end of the first operational amplifier are connected and used as the chaotic signal output end;
the encryption module comprises a fifth resistor and a second operational amplifier, the inverting terminal of the second operational amplifier is connected to the chaotic signal output terminal through the fifth resistor, the inverting terminal of the second operational amplifier is also connected between the first resistor and the second resistor, and the output terminal of the second operational amplifier is connected between the second resistor and the third resistor; the decryption module comprises a sixth resistor and a third operational amplifier, the inverting terminal of the third operational amplifier is connected to the chaotic signal output terminal through the sixth resistor, the inverting terminal of the third operational amplifier is also connected between the third resistor and a fourth resistor, and the output terminal of the third operational amplifier is connected to the voice signal output terminal; and the non-inverting ends of the second operational amplifier and the third operational amplifier are both grounded.
Optionally, the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are all precision resistors of 1k Ω.
Optionally, the first operational amplifier, the second operational amplifier and the third operational amplifier adopt two NE5534 operational amplifier chips.
Optionally, the chaotic signal generator includes a dc power supply, a first multiplier, a second multiplier, a first capacitor, a second capacitor, a third capacitor, a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor;
the X1 end of the first multiplier is connected with a direct-current power supply, the X2 end of the first multiplier is connected with one end of a ninth resistor, one end of a third capacitor, one end of a tenth resistor and the Z end of the second multiplier, the other end of the ninth resistor is connected with the W end of the second multiplier, and the other end of the third capacitor and the other end of the tenth resistor are respectively grounded;
the Y1 terminal of the first multiplier is connected to the X1 terminal of the second multiplier, the Y1 terminal of the second multiplier, one terminal of a seventh resistor and one terminal of a first capacitor, the other terminal of the first capacitor is grounded, the other terminal of the seventh resistor is connected to the Z terminal of the first multiplier, one terminal of an eighth resistor and one terminal of a second capacitor, the other terminal of the eighth resistor is connected to the W terminal of the first multiplier, and the other terminal of the second capacitor is grounded; the Y2 terminal of the first multiplier, the X2 terminal of the second multiplier and the Y2 terminal of the second multiplier are all grounded;
the output end of the chaotic signal generator is respectively positioned at the non-grounded endpoints of the first capacitor, the second capacitor and the third capacitor.
Optionally, the first multiplier and the second multiplier both use an AD633 multiplier.
Optionally, the first capacitor is a 10nF precision capacitor, the second capacitor and the third capacitor are 100nF precision capacitors, the seventh resistor is a 10k Ω precision resistor, the eighth resistor is a 100 Ω precision resistor, the ninth resistor is a 200 Ω precision resistor, the tenth resistor is a 2k Ω precision resistor, and the dc power supply is a 4V dc power supply.
Compared with the prior art, the utility model discloses the beneficial effect who reaches:
the utility model provides a voice encryption system of simplified class Lorenz circuit, through using chaotic signal to encrypt the signal, utilize the irregularity of mixing the moving signal, in the communication process, can the security of the effective assurance information; the chaotic signal generator is simplified by adopting resistance-capacitance coupling, the complexity of the chaotic circuit is reduced by the simplified circuit structure, and the reduction of devices not only reduces the cost, but also reduces the error of the circuit; compared with the traditional voice encryption device, the method changes the secret key of the plaintext, saves a digital encryption device and a complex encryption algorithm in a chaotic mask mode, reduces time delay and cost, and improves safety.
Drawings
Fig. 1 is a schematic circuit diagram of a voice encryption system of a simplified Lorenz-like circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a chaotic signal generator according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1, a simplified Lorenz-like circuit voice encryption system includes a voice signal input terminal, a voice signal output terminal, an encryption module, a decryption module, and a chaotic signal input module; a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4 are sequentially connected in series between the voice signal input end and the voice signal output end; the chaotic signal input module comprises a chaotic signal generator and a first operational amplifier U1, wherein the in-phase end of the first operational amplifier U1 is connected with the chaotic signal generator, and the output end and the anti-phase end of the first operational amplifier U1 are connected and used as chaotic signal output ends.
The encryption module comprises a fifth resistor R5 and a second operational amplifier U2, the inverting terminal of the second operational amplifier U2 is connected to the chaotic signal output terminal through a fifth resistor R5, the inverting terminal of the second operational amplifier U2 is also connected between the first resistor R1 and the second resistor R2, and the output terminal of the second operational amplifier U2 is connected between the second resistor R2 and the third resistor R3.
The decryption module comprises a sixth resistor R6 and a third operational amplifier U3, the inverting terminal of the third operational amplifier U3 is connected to the chaotic signal output terminal through a sixth resistor R6, the inverting terminal of the third operational amplifier U3 is also connected between a third resistor R3 and a fourth resistor R4, and the output terminal of the third operational amplifier U3 is connected to the voice signal output terminal; the non-inverting terminals of the second operational amplifier U2 and the third operational amplifier U3 are both connected to ground.
As shown in fig. 2, the chaotic signal generator includes a dc power Vcc, a first multiplier M1, a second multiplier M2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, and a tenth resistor R10; an X1 end of the first multiplier M1 is connected to a dc power supply Vcc, an X2 end of the first multiplier M1 is connected to one end of a ninth resistor R9, one end of a third capacitor C3, one end of a tenth resistor R10 and a Z end of the second multiplier M2, the other end of the ninth resistor R9 is connected to a W end of the second multiplier M2, and the other end of the third capacitor C3 and the other end of the tenth resistor R10 are respectively grounded; a Y1 end of the first multiplier M1 is connected to an X1 end of the second multiplier M2, a Y1 end of the second multiplier M2, one end of a seventh resistor R7 and one end of a first capacitor C1, the other end of the first capacitor C1 is grounded, the other end of the seventh resistor R7 is connected to a Z end of the first multiplier M1, one end of an eighth resistor R8 and one end of a second capacitor C2, the other end of the eighth resistor R8 is connected to a W end of the first multiplier M1, and the other end of the second capacitor C2 is grounded; the Y2 terminal of the first multiplier M1, the X2 terminal of the second multiplier M2 and the Y2 terminal of the second multiplier M2 are all grounded; the output end of the chaotic signal generator is respectively positioned at the non-grounded end points of the first capacitor C1, the second capacitor C2 and the third capacitor C3, and outputs a three-dimensional signal.
The working principle of the voice encryption system provided by the embodiment is as follows:
one dimension of the three-dimensional signals output by the chaotic signal generator is selected, voltage following (circuit mutual interference is prevented) is carried out through a first operational amplifier U1 to reach a chaotic signal output end, then the chaotic signals of the chaotic signal output end are used for encrypting the voice signals input by the voice signal input end, and encrypted signals are output; and decrypting the encrypted signal through the chaotic signal at the chaotic signal output end to obtain the original voice signal.
Specifically, in the voice encryption system, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 are all 1k Ω precision resistors. The first operational amplifier U1, the second operational amplifier U2 and the third operational amplifier U3 adopt two NE5534 operational amplifier chips.
Specifically, in the chaotic signal generator, the first multiplier M1 and the second multiplier M2 both adopt an AD633 multiplier. The first capacitor C1 is a precision capacitor of 10nF, the second capacitor C2 and the third capacitor C3 are precision capacitors of 100nF, the seventh resistor R7 is a precision resistor of 10k omega, the eighth resistor R8 is a precision resistor of 100 omega, the ninth resistor R9 is a precision resistor of 200 omega, the tenth resistor R10 is a precision resistor of 2k omega, and the DC power supply Vcc is a DC power supply of 4V.
The quality of the decrypted signal is greatly improved through the AD633 multiplier, the NE5534 operational amplifier chip, the precision resistor and the precision capacitor. The AD633 multiplying unit is used as a main operation module, flexible current output of a quadratic polynomial of the multiplying unit is combined, resistance-capacitance coupling achieves flexible differential constraint, a secondary item is introduced to obey rigid constraint of a circuit structure, the Lorenz-like chaotic circuit is simplified, an operation structure which is mainly used for operational amplifier and adopted by a traditional chaotic circuit is removed, the complexity of the circuit is reduced, the use of active devices is reduced, and errors generated by too many components are avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (6)
1. A voice encryption system of a simplified Lorenz-like circuit is characterized by comprising a voice signal input end, a voice signal output end, an encryption module, a decryption module and a chaotic signal input module; a first resistor, a second resistor, a third resistor and a fourth resistor are sequentially connected in series between the voice signal input end and the voice signal output end; the chaotic signal input module comprises a chaotic signal generator and a first operational amplifier, wherein the in-phase end of the first operational amplifier is connected with the chaotic signal generator, and the output end and the inverting end of the first operational amplifier are connected and used as chaotic signal output ends;
the encryption module comprises a fifth resistor and a second operational amplifier, the inverting terminal of the second operational amplifier is connected to the chaotic signal output terminal through the fifth resistor, the inverting terminal of the second operational amplifier is also connected between the first resistor and the second resistor, and the output terminal of the second operational amplifier is connected between the second resistor and the third resistor; the decryption module comprises a sixth resistor and a third operational amplifier, the inverting terminal of the third operational amplifier is connected to the chaotic signal output terminal through the sixth resistor, the inverting terminal of the third operational amplifier is also connected between the third resistor and a fourth resistor, and the output terminal of the third operational amplifier is connected to the voice signal output terminal; and the non-inverting ends of the second operational amplifier and the third operational amplifier are both grounded.
2. The system of claim 1, wherein the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are precision resistors of 1k Ω.
3. The voice encryption system of claim 1, wherein the first operational amplifier, the second operational amplifier and the third operational amplifier employ two NE5534 operational amplifier chips.
4. The simplified Lorenz-like circuit voice encryption system of claim 1, wherein the chaotic signal generator comprises a DC power supply, a first multiplier, a second multiplier, a first capacitor, a second capacitor, a third capacitor, a seventh resistor, an eighth resistor, a ninth resistor and a tenth resistor;
the X1 end of the first multiplier is connected with a direct-current power supply, the X2 end of the first multiplier is connected with one end of a ninth resistor, one end of a third capacitor, one end of a tenth resistor and the Z end of the second multiplier, the other end of the ninth resistor is connected with the W end of the second multiplier, and the other end of the third capacitor and the other end of the tenth resistor are respectively grounded;
the Y1 terminal of the first multiplier is connected to the X1 terminal of the second multiplier, the Y1 terminal of the second multiplier, one terminal of a seventh resistor and one terminal of a first capacitor, the other terminal of the first capacitor is grounded, the other terminal of the seventh resistor is connected to the Z terminal of the first multiplier, one terminal of an eighth resistor and one terminal of a second capacitor, the other terminal of the eighth resistor is connected to the W terminal of the first multiplier, and the other terminal of the second capacitor is grounded; the Y2 terminal of the first multiplier, the X2 terminal of the second multiplier and the Y2 terminal of the second multiplier are all grounded;
the output end of the chaotic signal generator is respectively positioned at the non-grounded end points of the first capacitor, the second capacitor and the third capacitor.
5. The system of claim 4, wherein the first multiplier and the second multiplier are AD633 multipliers.
6. The voice encryption system of claim 4, wherein the first capacitor is a 10nF precision capacitor, the second capacitor and the third capacitor are 100nF precision capacitors, the seventh resistor is a 10k Ω precision resistor, the eighth resistor is a 100 Ω precision resistor, the ninth resistor is a 200 Ω precision resistor, the tenth resistor is a 2k Ω precision resistor, and the DC power supply is a 4V DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220080205.5U CN217063749U (en) | 2022-01-12 | 2022-01-12 | Voice encryption system of simplified Lorenz-like circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220080205.5U CN217063749U (en) | 2022-01-12 | 2022-01-12 | Voice encryption system of simplified Lorenz-like circuit |
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| CN217063749U true CN217063749U (en) | 2022-07-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116110409A (en) * | 2023-04-10 | 2023-05-12 | 南京信息工程大学 | High-capacity parallel Codec2 vocoder system of ASIP architecture and encoding and decoding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116110409A (en) * | 2023-04-10 | 2023-05-12 | 南京信息工程大学 | High-capacity parallel Codec2 vocoder system of ASIP architecture and encoding and decoding method |
| CN116110409B (en) * | 2023-04-10 | 2023-06-20 | 南京信息工程大学 | High-capacity parallel Codec2 vocoder system of ASIP architecture and encoding and decoding method |
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